On Serious Mass – Vanilla 12Lb – New Design

The ULTIMATE weight gain formula.
Add serious mass with 1,250 quality calories per shake.
Support muscle growth with 50 g of proteins and 250 g of carbs per serving.
Enjoy between meals, post-workout &/or before bed.ON’s Serious Mass is the ULTIMATE weight gain formula. If you find it difficult to gain weight, Serious Mass will help you develop the physique you’ve always wanted!